80-90 roller 360 question

Respectfully, I have to question the what it being said here with regard to stock roller roller lifters and high performance applications. All of the Mopar Performance small block magnum crate motors are using this stock roller lifter setup. The 360 is rated at 395 HP and I have heard that is underrated. The stroker 406 is rated at 435 HP. I know people sometimes question MP quality but I still think their engineers know whats what.